Amazon opened its first till-less grocery store outside the USA in west London on Thursday.
Customers scan their smartphone app on the way in and then can "just walk out" with groceries, with their accounts automatically billed as they leave.
A number of cameras and sensors in the store ceiling track customers and their purchases.
The store, in Ealing Broadway, stocks hundreds of own-brand products as well as well known brands and also serves as a collection and return point for goods bought online.
The shop, open from 7am to 11am, is the first in the UK but Amazon is believed to be looking for other locations in Greater London.
Chiropractor Andrew Martin was one of the first customers this morning.
He said: “I just heard about it and had to come down. I use Amazon a lot and it’s really intriguing idea. It’s so strange just to be able to walk out with goods. I just hope it doesn’t lead me to accidentally shoplift in other shops because I get so used to the money coming out automatically.”
Teacher Sara Right added: “I live locally so it’s definitely convenient. It’s quite terrifying that it just knows what you’ve bought but it’s very easy so I think I’ll use it.”
